腐植酸和氮肥用量及其互作对植烟土壤质量的影响  

Effects of Humic Acid and Nitrogen Levels and Their Interaction on Tobacco Planting Soil Quality

作　　者：穆金丽 谭钧 刘国顺[1] 丁松爽[1] 温心怡[1] 

机构地区：[1]河南农业大学烟草学院,郑州450002 [2]香港中向国际有限公司,北京100022

出　　处：《土壤》2017年第1期27-32,共6页Soils

基　　金：香港中向国际有限公司"木本泥炭新型肥料在烟草领域应用"项目;中国烟草总公司浓香型特色优质烟叶开发项目(110201101001(TS-01))资助

摘　　要：以中烟100为材料,采用腐植酸和氮肥双因子盆栽试验,研究了腐植酸和氮肥用量及其互作对植烟土壤团聚体组成、养分及酶活性的影响。结果表明:干、湿筛法测定的土壤团聚体的平均重量直径均以T3处理(腐植酸900 mg/kg+氮肥40 mg/kg)最高,与其他处理相比提高幅度分别为15.3%~23.2%和6.5%~20.0%;方差分析显示,腐植酸与氮肥互作对土壤pH、有机质影响不显著,但对土壤碱解氮、有效磷、速效钾含量的影响达到极显著水平(P<0.01);二者互作对烤烟各生育期土壤脲酶、蔗糖酶活性影响不同。由此,腐植酸和氮肥用量及其互作对提高土壤团聚体稳定性、土壤主要养分含量及酶活性具有显著效果。A pot experiment was carried out on effects of different humic acid and nitrogen levels and their interaction on tobacco planting soil aggregate composition, nutrient and enzyme activity with the flue-cured tobacco variety of zhongyanl00. The results showed that the soil aggregate mean weight diameters of the treatment with T3 （900 mg/kg humic acid ＋ 40 mg/kg nitrogen） were the highest in both dry and wet sieving method, and compared with those of the other treatments, they were increased by 15.3 percent to 23.2 percent and 6.5 percent to 20 percent, respectively. Variance analyses showed that the interactions of humic acid and nitrogen were not significant on soil pH and organic matter, but extremely significant on soil available nitrogen, available phosphorus and available potassium contents （P〈0.01）, and different on soil urease and invertase activities in each growing period. The results indicated that humic acid, nitrogen and their interactions have significant effects on improving soil aggregate stability, soil nutrient contents and soil enzyme activities.

关 键 词：腐植酸 团聚体 土壤养分 土壤酶活性 

分 类 号：S572[农业科学—烟草工业]